I am deeply impacted. Apparently, the attacker spoke the communist china language, walked away with no resistance and is at large.

Without people being taught it is correct to have self-defense or to give them the tools to do so (USA 2nd Amendment on the Constitutional right to own arms) people will continue to be much like sheep being lead to be slaughtered. This is a typical england and communist china approach to relying upon government security to maintain control over the population as opposed to individual self-protection.

A situation such as occurred would have been solved in the USA by a bystander, as the children were apparently under 18 years old, to have a weapon such as a concealed or not concealed pistol and shot the attacker dead or otherwise. Knife attack ends. - That is self-protection.